Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7dfe52186dc8271…

MALICIOUS

PDF

38.7 KB Created: 2020-06-10 11:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f77e25c83c67323267c7ea28a023f6f SHA-1: 696f4f45ec73bbdbb9d2a92191a4faa1c5ea2b6f SHA-256: c7dfe52186dc8271c1ae4a8f15ec1bea85ea2ddb9dc55548ab0d81b68cf848f4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains several URLs that are likely part of a link farm or SEO spam campaign. The primary intent appears to be directing users to these external sites, which could host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://macrotopia.com/uploads/1/3/1/3/131398182/131398182.html#telugu+guninthalu+ma+gunintham
    • http://tearohaprimary.com/uploads/1/3/1/6/131606146/sezaka-devodigoku.pdf
    • http://laserscannerrentals.com/uploads/1/3/0/5/130550890/5853424.pdf
    • http://katebond.org/uploads/1/3/0/8/130873983/4806197.pdf
    • http://thekfdevelopment.com/uploads/1/3/0/8/130813769/34dec5bc4baa.pdf
    • http://tamingyourtummy.com/uploads/1/3/1/3/131384025/tasatulafaji-zevibugig-ramogevi.pdf
    • https://febiralugo.files.wordpress.com/2020/06/37374050690.pdf
    • https://pazizeloguk.files.wordpress.com/2020/06/11700530552.pdf
    • https://kaluferono394203149.files.wordpress.com/2020/06/88382017736.pdf
    • https://lunudosur.files.wordpress.com/2020/06/11346214122.pdf
    • https://sowapije.files.wordpress.com/2020/06/50925203768.pdf
    • https://polijexite.files.wordpress.com/2020/06/noseruniwamobotuvapibi.pdf
    • https://mesumuvalu.files.wordpress.com/2020/06/31134029590.pdf
    • https://degigox.files.wordpress.com/2020/06/63709055456.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004eaf.bin
5f5a763272a055a2ae3dcfd4a5aa90ad12b185972f1968838cf360b75cae1f3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EAF 11472 bytes
font_01_sfnt_off00006d68.bin
85a5b57b663a314279dafdb5d993b47dd450733acdaefcd4dbe677eb09f19078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D68 9488 bytes

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